This study addresses the environmental vibration issues of adjacent brick-concrete structures induced by subway operations,focusing on a 7-story brick-concrete building as the primary investigation subject.Vibrations were measured at the tunnel,outdoor ground level,and various structural floors to analyze the propagation characteristics along the"tunnel-ground-structure"path.The study aims to identify reasons for vibration levels exceeding standards.Key factors contributing to the issue include the shallow depth of tunnel burial,the proximity of buildings to the tunnel,and their shared soil layer,resulting in inadequate vibration attenuation through the soil.Additionally,resonance effects within specific floor slabs of the structure contribute to vibration responses surpassing evaluation standards outdoors and on the first indoor floor.A finite element model of the brick-concrete structure was constructed using measured vertical accelerations at column bases as loads.The model's accuracy was validated against measured floor responses,confirming amplification effects on middle and upper floors.Parametric analysis explored the impacts of floor count,story height,slab thickness,and wall thickness on the spatial distribution of vibration responses.The findings from this study provide valuable insights for evaluating environmental vibrations in similar structures,offering guidance for mitigating effects and ensuring compliance with vibration standards.
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